Door



E. B. SMITH noon Dec. 29, 1925.

2 Sheets-Sheet 1 Filed Dec. 11 1922 IMF/V70)? v Ezrafl'fimzik ATTORNEY Patented Dec. 29, 1925.

' UNITED STATES PATENT QFFICE.

EZRA. B. SMITH, 0F RAVENSWOOD, ILLINOISyASSIGNOR TOJOHN EDWARD OGDEN, 0F

MOUNTAINVILLE, NEW" YORK.

DOOR.

Application filed December 11, 1322. Serial 110. 608,275

To all whom it may 00mm..-

Be it known that I, EZRA B. SMITH, a citizen of the United States, and a resident of Ravenswood, county of Cook, Chicago, and State of Illinois, have invented certain new and useful Improvements in Doors, of which the following is a specification.

This invention relates to doors and more particularly to doors of the type used as fire doors in elevator hatchways.

One of the objects of the invention is to provide a door having superior fire resisting or insiilating properties. i

Another object of the invention is to pro vide a door of the character described that is'comparatively light but rigid in construction and that will occupy a minimum amount of space.

' Another videa door the parts object of the invention is to proso constructed'and arranged that may be readily assembled and secured together.

Another object of the invention is to provide a door havmgrelnforclng .means so located as tobe concealed thereby not detractingfrom the appearance of the door. Another obge-ct of the lnvention is to provide a fire door of minimum weight and maximum strength.

Further objects of the invention will appear from the following description taken in connectionwith the drawings which form .a. part of this application and in which,

Fig, 1 is a sectional elevation of a portion of anelevator hatchway showing a pair of fire doors mounted therein,

Fig, 2 is a transverse sectional View taken substantially on line 2-2 of Fig. 1.

Fig. 3 is an elevational view, partly broken away, of a-fire door constructed. in accord ance with the invention.

-liig'. 4 is an irregular transverse section taken substantially on line 4 '4 of Fig. 3, a 2 F ig. 5 is asectional elevation taken substantially on line 5-5 of Fig. 3.

V The doorjbriefiy described comprises-a frame which in the embodiment of the invention shown is formed of T-shaped members andcorrugatedsheet metail sheets secured to the webs of the T-frame. Insulating material such as asbestos or sheet-rock (gypsum) i is preferably mounted between the corrugated sheets. The sheets are sorelaare, web 16 of the frame member 13 tively disposed that the valleys or depressions and extending portions of one sheet are disposed opposite the respective valleys and eirtending portions of the other sheet thereby providing air chambers and in the particular form of the invention illustrated these air chambers are vertically disposed. In order to strengthen the door reinforcing members are secured to the top and bottom will close the door opening.

In Figs. 85 inclusive the details of the door construction are illustrated. The frame of the door consists of four frame members 13 preferably T-shap'ed in section as shownlin Fig. 5'and rigidly secured together at their corners in any desired manner. such as by welding.

The "reinforcing members are then secured to the upper and lower door frame members and each of these reinforcing members preferably consists of a tubular member or hollow pipe 14. having a longitudinal slot 15 at each end. As shown in Fig. 5 the slots 15 are made longer thanthe leiigth of thereby permitting the tubular members to be mounted in the frame by tilting these members until the webs 16 of the upper and lower frame members are disposed in the slots and then swinging the members 14 to upright position. The members or pipes 14. are then rigidly secured to the webs by rivetin gor in any other desired manner.

corrugated sheet 17 preferably having the corrugations extending longitudimounted in alinement with the webs 16 of the frame members and thereafter the other corrugated sheet 19 15 mounted on the opposite side of the webs 16. The corrugated set forth may be made 13 to permit for circulation of air and prevent accumulation of dirt within the corrugations.

The frame of the door has secured theretolongi'tudinally ext-ending webs 22 having offset extensions 23, the webs and extensions bein mounted in the vertical guideways 10 of the elevator hatchway and the extensions 23 providing for lateral expansion of the door. The side frame members also have secured thereto lugs 24; to which are attached the operating rods and chains for the door.

Attention is called to the fact that the registration of the valleys and extended A portions of the corrugated sheets is particularly advantageous since vertical air chambers are thus produced and the mounting of the reinforcing members or pip-es is facilitated and the construction makes it possible touse as many of these reinforcing members as desiredwithout detracting from the appearance of the door since the reinforcingmembers are concealed from view. The

registration of the valleys furthermore permits the use of the same rivets to secure both corrugated sheets to the frame with the insulating material between the sheets.

It will thus be evident that the door constructed and arranged as set forth will possess superior fire resisting or insulating qualities, and will be strong and rigid but comparatively light in construction and may be very economically manufactured. It will also be evident that a door constructed as will not transmit heat. It is a very desirable feature to prevent the temperature within a building from being lowered'by the loss of heat through the door.

Although one specific embodiment ofthe invention has been particularly illustrated and described it will be understood that the invention is capable of modification and that changes in the construction and in the arrangement of the various cooperating parts without departing from the spirit or scope of the invention as expressed in the following claims.

What I claim is V 1. A door comprising a rigid frame, corrugated metallic sheets secured thereto and a plurality of independent reinforcing members disposed between said sheets and secured to said frame.

2. A door comprising a rigid frame, corrugated metallic sheets secured thereto and tubular reinforcing means disposed between said sheets and secured to said frame.

3. A door comprising a rigid frame, corrugated metallic sheets. secured thereto, said sheets being secured to each other with the valleys in registration and secured together, and a plurality of independent reinforcing members disposed between said sheets and secured to said frame.

4:. A door comprising a rigid frame of T-shaped material with the web directed inwardly, corrugated metallic sheets secured to the opposite faces of said web, and reinforcing means disposed between said sheets and secured to said frame. 7

5.'A door comprising a rigid frame of T-shaped material with the web directed inwardly, corrugated metallic sheets secured to the opposite faces of said web and reinforcing means comprising tubular members disposed between said sheets and secured to said frame.

6. A door comprising a rigid frame, corrugated metallic sheets secured thereto with the corrugations disposed vertically, and a plurality of independent reinforcing members disposed. between said sheets and secured to said frame.

7. A door comprising a rigid frame of T-shaped material with the webs directed inwardly, corrugated metallic sheets secured tothe opposite faces of said web, and tubular reinforcing members secured to the webs of the upper and lower frame members and disposed between said corrugated sheets.

8. A door comprising a rigid frame of T-shaped material with the webs directed inwardly, corrugated metallic sheets secured to the opposite faces of said web, tubular reinforcing members secured to thewebs of the upper and lower frame members and disposed between said corrugated sheets, and asbestos material secured between said sheets. Y

9. A door comprising a frame having an inwardly extending web, sheet metal cover members secured thereto and reinforcing members comprising pipes between said sheets and having'longitudinal slots receiving said web and means securing said pipes to said web.

10. A door comprising a rectangular frame having a. web extending inwardly from the top, bottom and side members thereof, tubular reinforcing members secured to the web of the top and bottom frame members and corrugated sheets, having vertically extending corrugations, secured to said door frame and covering said reinforcing members.

11. A door comprising a frame and corrugated sheets secured thereto with the cor rugations disposed vertically and with the valleys and extended portions of one sheet positioned opposite the valleys and extended sheets.

portions of the other sheet and reinforcing means secured to said frame and disposed in the extended portions of the sheets.

12. A door comprising a frame and corrugated sheets secured thereto with the corrugations disposed vertically and with the valleys and extended portions of one sheet positioned opposite the valleys and extended portions of the other sheet, and vertically disposed reinforcing means secured to the top and bottom of the frame and located in the extended portions of the corrugated 13. A door comprising a rigid frame of T-shaped metallic members with the webs thereof directed inwardly and lying in substantially the same plane, a flat sheet of insulating material between said webs and in the same plane, and corrugated sheet metal sheets over the opposite sides of the sheet of insulating material, affixed to said webs, and means for securing together the covering sheets with the insulating material therebetween.

14-. A door comprising a rigid frame of T-shaped metallic members with the webs thereof directed inwardly and lying in substantially the same plane, a flat sheet of insulating material between said webs and in the same plane, sheets of corrugated metal disposed over the opposite sides of the sheet of insulating material with their valleys in alinement with one another and rivets in said valleys securing the sheets to said frame with insulating material therebetween.

15. A door comprising a rigid frame, a corrugated metallic sheet secured thereto and having valleys and extended portions and tubular reinforcing means secured to the frame and disposed in an extended portion of said sheet.

16. A door comprising an open rectangular frame, a corrugated metallic sheet secured thereto at the top, bottom and sides thereof and having valleys and extended portions and tubular reinforcing means secured to the frame and disposed in an extended portion of said sheet.

In witness whereof, I have hereunto set my hand this 7th day of Dec, 1922.

EZRA B. SMITH. 

